Numerical simulation of marine currents in the Bunaken Strait, North Sulawesi, Indonesia

International Conference on Innovation in Engineering and Vocational Education

自然科学;教育

Rompas, P.T.D.^1 ; Manongko, J.D.I.^1

Faculty of Engineering, Universitas Negeri Manado, Tondano, North Sulawesi

95618, Indonesia^1

关键词: 3-D numerical simulation;    Average currents;    Numerical calculation;    Numerical results;    Numerical solution;    Shallow water equations;    Three-dimensional model;    Vertical direction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/128/1/012003/pdf
DOI  :  10.1088/1757-899X/128/1/012003

来源: IOP

【 摘 要 】

This study intended for the generation of hydroelectric power at suitable area of the strait in order to provide electric current to a close environment. The project uses a three-dimensional model of taking flow into account the variation of hydrostatic pressure in the liquid vertical layers. We brought back to a two-dimensional calculation using the shallow water equations. The objectives of the study are getting simultaneous obtaining the velocities of currents by the component of velocities and distributions of the kinetic energy from the numerical results. The Bunaken strait is 5280 m width for an average depth of 130 m. Numerical calculation is simulated using horizontal meshes of 60 side meters. The numerical solutions obtained by using a time step of one second. It found that there was no great difference between 2D and 3D numerical simulations because the effect of flow velocity in the vertical direction is very small. The numerical results have shown that the average current velocities when low and high tide currents are 1.46 m/s and 0.85 m/s respectively. The kinetic energy ranged from 0.01 to 2.54 kW/m2when low and high tide in the Bunaken strait area at discharge of 1 Sv, whereas at discharge 2 Sv, 0.11-17.40 kW/m2and 0.11-2.77 kW/m2(when low and high tide currents). These results can used in the design of turbines for power generation marine currents in the Bunaken strait at depths below 60 meters.